College students with a checking account typically write relatively few checks in any given month, whereas full-time residents typically write many more checks during a month. Suppose that 50% of a bank’s accounts are held by students and that 50% are held by full-time residents. Let x denote the number of checks written in a given month by a randomly selected bank customer.

a) Give a sketch of what the probability distribution of x might look like.

How the hell am I supposed to know this? Is it just a bell curve?

Sorry for asking so many questions, I think a week into this course I've learned, above all, that tutoring shall be a necessity to get this work done... :/